Coupling for whiffletrees.



No. 680,I08. Patented Aug. 6, IQDI.

T. A. BAKKEN.

ACUPLIN? FOR WHIFFLETBEES.

(Application led Mar. 5, 1901.)

(No Model.)

@Vi l'n eases Y UNITED STATES I PATENT OFFICE.

THORE A. BAKKEN, OF DE SOTO, WISCONSIN.

COUPLING FOR WHIFFLETREES.

SPECIFICATION forming part of Letters Patent No. 680,108, dated August6, 1901.

' Application inea March 5,1901. serial No. 49,798. (No model.)

Z'oaZZw/wm it may concern.'

Be it known that'I, THORE A. BAKKEN, a citizen of the United States,residing at De Soto, in lthe county of Vernon and State of Wisconsin,have invented certain new and useful Improvements in Couplings forWhifiietrees; and I do hereby declare the following to be ay full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in Whiffletree-couplings, andmore specifically to such devices which are provided with means forlimiting the movement of the trees with respect to each other and meansfor preventing the tipping or turning over of the same. It hasparticular reference to certain improvements upon the structure shownand described in my former patent, issued January 1,1901,

No. 665,049, and contemplates certain novel constructions, combinations,and arrangements of parts to be applied thereto and used in connectiontherewith, as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure l represents a perspective view ofa coupling made in accordance with my invention 'and applied to a doubleand single tree. Fig. 2 represents a vertical cross-section through thesaid coupling. Fig. 3 is a perspective view of a clip or clevis formingpart of said coupling. Fig. 4 is a front elevation of the p arts of myimproved coupling illustrated in Fig. 1. Fig. 5 represents aperspectiveview of the locking-plate; and Fig. 6 is a similar view to Fig. 2,illustrating the two lower parallel members of the clevis formedintegral with the lower bearing-plate and the lockplate formed integralwith the upper bearingplate.

As I chiefly desire in this application to describe particularly onlythose features which are novel over my former patent, above referred to,I shall describe but briefly the old v parts herein shown, somedescription of the same being necessary to more clearly bring out thegreat importance and advantages of my improvements- Y In theaccompanying drawings, 1 indicate a doubletree, 2 a singletree, and 3 acoupling for securing the same together. The

coupling comprises a double clip or clevis 4, a lock-plate 5, a pivotpin or bolt 6, and bearing-plates '7, inclosing said bolt. The clevis 4comprises three parallel members, as S, 9, and 10, provided withregistering apertures at their free ends and provided with a rearconnecting-piece and formed integral therewith. Flanges, as 1l 1l, areprovided on either side of the lower half of the rear piece and adaptedto be used as securing means.

A ledge or projection, as 12, extends for a short distance forward fromthe rear connecting-piece above member 9 and is adapted to engagelock-plate 5 when in operation, and thereby prevent the possibility ofthe tipping or turning over of the singletree, the said lock-plate beingcarried by the singletree. Clevis 4 is adapted to be applied to thewhiffletrees with member 8 above the singletree, member 10 below thedoubletree, and member 9 between the two trees.

The lock-plate 5 is preferably of segmental form, having one of itscorners apertured, as at 12', thesaid aperture when the plate is inoperable position registering with the apertures in members 8, 9, and10. On the opposite corners from the aperture are formed lugs, as 13 13,which in operation engage member 9 of clevis 4, and thereby limit themovement of the parts. Extending in an opposite direction from said-lugsare strips 1414, which may be of any suitable length and apertured toreceive securing means, as at 15 15, whereby a clampingl effect isproduced upon the rear of the singletree.

Between members 8 and 9 and 9 and 10 are interposed two bearing-plates 77, which are formed of transversely concaved pieces adapted to be heldcontiguous to the edges of trees 1 and 2, said trees being formed withtransverse semicircular grooves registering with said concaved platesand forming a housing about said bolt 6. These bearingplates partiallyinclosing said bolt tend to prevent wear upon the whiflietrees and addstrength to the coupling and to the trees. This feature I consider oneof the most important of my present improvements. The

upper bearing-plate 7 may be formed integral with lock-plate 5, and thelower bearingplate may be formed in one withv members 9 and 10 but Ipreferably form these bearingssl IOO

plates separately. Upon either opposite side ot" each of the plates 7are `formed anges 16 16, which are preferablyapertured to receivesecu-ring means, as at 17 17. I preferably pass bolts, rivets, or othersuitable securing means through said apertures in the .lower iianges,through the doubletree, and

through apertures formed in flanges 11 11 for securing the parts iirmlytogether. These securing means are seen'in Fig. 2 at- 18 in dottedlines. I also pass securing means through apertures 17 of the upperanges 16,

.. through the singletree, and through apertures 15 15 of lugs 14 14,whereby I secure not only the upper bearing-plate 7, but also thelock-plate 5. Any securing means, as screws, may be utilized at variousother points of the coupling for more firmly securing the parts;

.but I have found the securing means just de* scribed sufficient andpreferable.

I preferably form a sqnareaperture in the free end of member 8 toreceive the squared portion of a bolt 6, thereby preventing rotation ofsaid bolt.. Bolt G passes through lthe registering apertures of thethree parallel members and ot' the lock-plate and contiguous to theupper and lower bearing-plates 7, whereby it is held against movementother than a partial rotation upon the movement of doubletree l. Iprefer to slightly enlarge the free end of member 9, as illustrated inFig. 3, whereby the aperture therethrough l does not weaken the part.

Vhen the bearing-plates 7 are formed separately, as is preferred, theclevis 4 may be directly appliedto the whiiiietrees, but when formedintegral with other parts, as hereinbefore described, the said clevismust be forced onto the doubletree from the end thereof and then appliedto the whiftletree.

It isobvious that a firmness and rigidity of the parts will be securedby my improved y construction, and yet all necessary movethereof, andmeans for locking said whifiietrees intheir movement with respect toeach other, comprising alocking-platmmeans carried thereby for engagingparts of said clevis, strips of material integral with'said lockingplateand adapted to be secured about the rear of one of the trees, whereby aclamping effect will be produced upon said tree, and meansfor securingsaid strips to said tree, substantially as described.

2. A coupling for whiftietrees, comprising a double clevis, one of itsmembers being adapted to pass above oneof said trees, one below theother tree, and one between the two trees, a bolt passed through thekfree ends of said members, a plate carried by one of said trees forlimiting the movement of the same,

a housing about a portion of said bolt formed integral with saidlocking-plate, and a housing about another portion of said bolt andformed integral with said central member and with one of the outermembers, substantially as described.

A coupling for whiiiietrees, comprising a double clevis for securing thetrees together, means for limiting the movement of said trees withrespect to each other, means for pre- Venting the singletree fromtipping or turning over, a lock-plate carried by said singletree,apertured strips extending from' said lock-platoy to the rear of andadapted to be clamped upon the singletree, securing-anges extending fromeither side of the lower half of the rear ot the double clevis, a boltadapted to pass through the free ends ot' said clevis to lock the partstogether, bearing-plates between the upper and central, and central andlower members 0E said clevis, partially surrounding said bolt,securing-flanges extending from either side of each of saidbearingplates, securing means passed through the flanges ot the lowerbearing-plate, the doubletree and through the flanges on the rear ofsaid clevis, and means passed through the flanges of said upperbearing-plate, the singletree and through the` apertured stripsextending from said locking-plate for securing the parts together,substantially as described.

In testimony1 whereof I hereunto affix my signature in presence of twoWitnesses.

' THORE A. BAKKEN. Vitnesses HARRY G. DYER, J. I-I..Roenns.

IOO

